Search Results for author: Shalmali Joshi

Found 22 papers, 5 papers with code

Machine Learning for Health symposium 2022 -- Extended Abstract track

no code implementations28 Nov 2022 Antonio Parziale, Monica Agrawal, Shalmali Joshi, Irene Y. Chen, Shengpu Tang, Luis Oala, Adarsh Subbaswamy

A collection of the extended abstracts that were presented at the 2nd Machine Learning for Health symposium (ML4H 2022), which was held both virtually and in person on November 28, 2022, in New Orleans, Louisiana, USA.

"Why did the Model Fail?": Attributing Model Performance Changes to Distribution Shifts

1 code implementation19 Oct 2022 Haoran Zhang, Harvineet Singh, Marzyeh Ghassemi, Shalmali Joshi

In this work, we introduce the problem of attributing performance differences between environments to distribution shifts in the underlying data generating mechanisms.

Towards Robust Off-Policy Evaluation via Human Inputs

no code implementations18 Sep 2022 Harvineet Singh, Shalmali Joshi, Finale Doshi-Velez, Himabindu Lakkaraju

When deployment environments are expected to undergo changes (that is, dataset shifts), it is important for OPE methods to perform robust evaluation of the policies amidst such changes.

Multi-Armed Bandits Off-policy evaluation

Generalizing Off-Policy Evaluation From a Causal Perspective For Sequential Decision-Making

no code implementations20 Jan 2022 Sonali Parbhoo, Shalmali Joshi, Finale Doshi-Velez

A precise description of the causal estimand highlights which OPE estimands are identifiable from observational data under the stated generative assumptions.

counterfactual Decision Making +1

Pulling Up by the Causal Bootstraps: Causal Data Augmentation for Pre-training Debiasing

1 code implementation27 Aug 2021 Sindhu C. M. Gowda, Shalmali Joshi, Haoran Zhang, Marzyeh Ghassemi

This systematic investigation underlines the importance of accounting for the underlying data-generating mechanisms and fortifying data-preprocessing pipelines with a causal framework to develop methods robust to confounding biases.

Benchmarking Data Augmentation +1

Exploring Counterfactual Explanations Through the Lens of Adversarial Examples: A Theoretical and Empirical Analysis

no code implementations18 Jun 2021 Martin Pawelczyk, Chirag Agarwal, Shalmali Joshi, Sohini Upadhyay, Himabindu Lakkaraju

As machine learning (ML) models become more widely deployed in high-stakes applications, counterfactual explanations have emerged as key tools for providing actionable model explanations in practice.

counterfactual Counterfactual Explanation

Learning Under Adversarial and Interventional Shifts

no code implementations29 Mar 2021 Harvineet Singh, Shalmali Joshi, Finale Doshi-Velez, Himabindu Lakkaraju

Most of the existing work focuses on optimizing for either adversarial shifts or interventional shifts.

An Empirical Framework for Domain Generalization in Clinical Settings

1 code implementation20 Mar 2021 Haoran Zhang, Natalie Dullerud, Laleh Seyyed-Kalantari, Quaid Morris, Shalmali Joshi, Marzyeh Ghassemi

In this work, we benchmark the performance of eight domain generalization methods on multi-site clinical time series and medical imaging data.

Domain Generalization Time Series +1

Towards Robust and Reliable Algorithmic Recourse

no code implementations NeurIPS 2021 Sohini Upadhyay, Shalmali Joshi, Himabindu Lakkaraju

To address this problem, we propose a novel framework, RObust Algorithmic Recourse (ROAR), that leverages adversarial training for finding recourses that are robust to model shifts.

Decision Making

Confounding Feature Acquisition for Causal Effect Estimation

1 code implementation17 Nov 2020 Shirly Wang, Seung Eun Yi, Shalmali Joshi, Marzyeh Ghassemi

Reliable treatment effect estimation from observational data depends on the availability of all confounding information.

Causal Inference

Ethical Machine Learning in Health Care

no code implementations22 Sep 2020 Irene Y. Chen, Emma Pierson, Sherri Rose, Shalmali Joshi, Kadija Ferryman, Marzyeh Ghassemi

The use of machine learning (ML) in health care raises numerous ethical concerns, especially as models can amplify existing health inequities.

BIG-bench Machine Learning Ethics

Sequential Explanations with Mental Model-Based Policies

no code implementations17 Jul 2020 Arnold YS Yeung, Shalmali Joshi, Joseph Jay Williams, Frank Rudzicz

The act of explaining across two parties is a feedback loop, where one provides information on what needs to be explained and the other provides an explanation relevant to this information.

Counterfactually Guided Off-policy Transfer in Clinical Settings

no code implementations20 Jun 2020 Taylor W. Killian, Marzyeh Ghassemi, Shalmali Joshi

Domain shift, encountered when using a trained model for a new patient population, creates significant challenges for sequential decision making in healthcare since the target domain may be both data-scarce and confounded.

counterfactual Decision Making

What went wrong and when? Instance-wise Feature Importance for Time-series Models

no code implementations5 Mar 2020 Sana Tonekaboni, Shalmali Joshi, Kieran Campbell, David Duvenaud, Anna Goldenberg

Explanations of time series models are useful for high stakes applications like healthcare but have received little attention in machine learning literature.

counterfactual Feature Importance +2

Explaining Time Series by Counterfactuals

no code implementations25 Sep 2019 Sana Tonekaboni, Shalmali Joshi, David Duvenaud, Anna Goldenberg

We propose a method to automatically compute the importance of features at every observation in time series, by simulating counterfactual trajectories given previous observations.

counterfactual Feature Importance +2

xGEMs: Generating Examplars to Explain Black-Box Models

no code implementations22 Jun 2018 Shalmali Joshi, Oluwasanmi Koyejo, Been Kim, Joydeep Ghosh

This work proposes xGEMs or manifold guided exemplars, a framework to understand black-box classifier behavior by exploring the landscape of the underlying data manifold as data points cross decision boundaries.

Identifiable Phenotyping using Constrained Non-Negative Matrix Factorization

no code implementations2 Aug 2016 Shalmali Joshi, Suriya Gunasekar, David Sontag, Joydeep Ghosh

This work proposes a new algorithm for automated and simultaneous phenotyping of multiple co-occurring medical conditions, also referred as comorbidities, using clinical notes from the electronic health records (EHRs).

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